125112122521 has 8 divisors (see below), whose sum is σ = 126369665024. Its totient is φ = 123858836640.

The previous prime is 125112122441. The next prime is 125112122549. The reversal of 125112122521 is 125221211521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125112122521 - 2¹⁷ = 125111991449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125112122561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1005060 + ... + 1122661.

It is an arithmetic number, because the mean of its divisors is an integer number (15796208128).

Almost surely, 2^125112122521 is an apocalyptic number.

It is an amenable number.

125112122521 is a deficient number, since it is larger than the sum of its proper divisors (1257542503).

125112122521 is a wasteful number, since it uses less digits than its factorization.

125112122521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128311.

The product of its digits is 800, while the sum is 25.

The spelling of 125112122521 in words is "one hundred twenty-five billion, one hundred twelve million, one hundred twenty-two thousand, five hundred twenty-one".